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Color blindness, also known as color vision deficiency, occurs when an individual cannot distinguish between certain colors like red and green or, less commonly, blue and yellow.
Cause of Color Blindness
Light-sensitive tissue, the retina, lines the back of the eye and consists of two types of light

Ocular rosacea, an inflammation of the eye and/or eyelid, occurs in conjunction with rosacea of the skin. A chronic inflammatory condition, rosacea primarily affects the face, cheeks, forehead, and chest area. When rosacea affects the eyes and/or eyelids, the condition is known as ocular rosacea.
Ocular

Seeing a spot or a flash of light in your field of vision is more than an inconvenience. It could be the first signs of a detached retina. A retina becomes detached when separated from underlying layers of support tissue. Detached retinas will lead to a permanent loss of vision if they are not quickly

The cornea is present as a clear tissue that is located at the front of the eye. A corneal ulcer occurs when there is a sore in the layer of the cornea. Symptoms of this include redness, drainage, visual disturbances, sensitivity to light, itching and discomfort.
Causes and Effects of Corneal Ulcers
The

Conjunctivitis, also known as pink eye, is a common eye problem that can afflict children and adults alike. It is highly contagious and spreads quickly in environments like classrooms or offices filled with multiple people in close proximity to one another. The good news is that conjunctivitis is easily

Caused by the same irritants as hay fever, runny nose, coughing, and sneezing, eye allergies commonly affect those who suffer from other allergy symptoms. Not only do eye allergies cause discomfort, but they can also interfere with daily activities.
Eye Allergy Causes
Medically referred to as allergic

Acanthamoeba keratitis is a relatively rare type of eye infection, but it can become quite serious. If left untreated, Acanthamoeba eventually leads to vision loss, requiring a corneal transplant to restore sight. Understanding how to prevent this infection is key.
What Is Acanthamoeba Keratitis?
Acanthamoeba

A stye, sometimes spelled as "sty," is a red, painful bump near the edge of the eyelid. It may look like a pimple or abscess, and it can form on the inside or outside of the eyelid. A stye is actually a localized infection that usually disappears by itself after a few days, although in rare cases, a

A chalazion is the medical term for a slowly developing lump on the eyelid that occurs due to an oil gland blockage. At first, the eyelid may appear to be red, tender and swollen. After several days, the chalazion will form on the eyelid, appearing as a slow growing lump. While it is initially painless

Stinging, irritated eyes, and blurred vision may indicate nothing more than a case of blepharitis -- an unpleasant but, in most cases, relatively harmless condition. Blepharitis is a chronic eyelid inflammation caused by a variety of irritants and/or the inability to maintain proper eye lubrication.

If you suffer from Bell's palsy, a paralysis of one side of the face caused by nerve inflammation, you may lose control over your eyelids. This eyelid paralysis can create problems for the sensitive cornea that protects the eye's lens and helps focus light waves into clear images. Fortunately, an experienced

Uveitis refers to the inflammation of the eye's middle layer, which consists of the iris, ciliary body, and choroid. Several fungal, viral, or bacterial infections lead to uveitis, as do certain autoimmune (systemic) and inflammatory conditions. In most cases of uveitis, however, the exact cause is unknown.
Types

Almost everyone uses computers in the modern world, whether for recreation, employment, education or any combination of the three. Unfortunately, our increased use of computers in almost every aspect of our lives -- even using a smartphone to make a telephone call -- requires our eyes to read a computer

Commonly called crossed eyes, strabismus is a condition in which eyes do not work together, failing to maintain proper alignment. While one eye focuses on an object, the other does not. The failure of the eyes to work together causes double vision, and if untreated can lead to an extreme reduction of

Pronounced SHOW-grins, Sjogren's syndrome is a disorder of the immune system, or an autoimmune disease, which causes the body's immune system to attack and harm the body's glands. Your glands are responsible for the production of saliva, tears, and other lubrication necessary for the proper function

Also known as demyelinating optic neuritis, optic neuritis refers to the inflammation of the optic nerve due to the loss of or damage to a protective covering called myelin, which surrounds the optic nerve. The myelin is essential to the function of the optic nerve. A more general term, optic neuropathy,